III International Conference

PP-II-130Evaluation of Ni-Cu, Fe-Ni and Ni-Pd catalysts’ activity was studied using the method of thetemperature-programmable reaction. For determining of stability resource experiments wereheld.It was determined that optimal temperature range for Ni-Cu-(10wt. %) Al 2 O 3 catalysts isabout 600-700 o C. According to data obtained, increasing of the copper in the catalyst from8% wt. to 20% wt. leads to the increasing of catalyst’s stability and maximum yield ofhydrogen. The best result showed the 70%Ni-20%Cu-10%Al 2 O 3 catalyst, which had workedstably during tens of hours at the temperature of 700 o C. Methane conversion was 60 %.Optimal temperatures for getting hydrogen during the methane decomposition using Fe-Nicatalysts are in the range of 700-750 o C. The variation of Ni content in the catalysts allowedto determine that the maximum yield of hydrogen can be obtained using catalysts of 60%Fe-15%Ni-Al 2 O 3 . This catalyst works effectively at the temperature of 750 o C, providing themethane conversion on the level of 60 %.Conversion, provided by Ni-Pd-10%SiO 2 catalysts increases in the range of 600-850 o C.Catalysts of Ni-Pd-10%SiO 2 content are able to maintain a high level of methane conversionunder temperatures of 800-850 o C. The biggest yield of hydrogen was 285 g (855 g of carbon)per 1 g of catalyst for the 45%Ni-45%Pd-10%SiO 2 catalyst at the temperature of 800 o C. Thetime of stable work was 50 hours.It was revealed the starting stage of the process decomposition effects the stable work ofthe catalyst. In the case of feeding of methane to a reactor after heating of reduced catalyst inthe argon medium under 800 o C, the catalyst deactivates quickly. And the catalyst stability ismuch higher in the case of process’ starting on the catalyst in the sphere of methane at the lowtemperature and further increasing of the process temperature to 800 o C.Results obtained shows that examined catalysts are very attractive to us under the hightemperatures and allow to get a mixture with high concentration of hydrogen.402